[单项选择]Only when we have weighted all the factors involved（　）decide when would be the best time to start.
A. did we
B. we did
C. can we
D. we can

[单项选择]Only when we have weighted all the factors involved ______ decide when would be the best time to start.
A. did we
B. we did
C. can we
D. we can

[单项选择]Only when you have completed the basic English course ______ be permitted to take the advanced courses.
A. you can
B. can you
C. you will
D. that you

[单项选择]It is only when you overcome all difficulties and reach your goal ______ fully aware that the way to success is not paved with flowers.


A. do you become
B. then you become
C. that you become
D. have you become

[单项选择]Only when you have a good knowledge of grammar （） write correctly.
A. you will
B. you can
C. can you
D. can't you

[单项选择]Only when you have obtained sufficient data ______ come to a sound conclusion.
A. can you
B. would you
C. you will
D. you can

[单项选择]We have done all we could and now our cherished project is at the mercy of our new CEO.
A. under the guidance of
B. in the power of
C. on the verge of
D. on the agenda of

[单项选择]Only when （　） possible for all the people present to make a final decision.
A. does the director come will it be
B. the director comes will it be
C. has director come it will be
D. the chief editor comes it will be

[单项选择]（　）we have all the materials ready, we should begin the new task at once.
A. Since that
B. Since now
C. By now
D. Now that

[单项选择]Only when father came back ______ to have supper.
A. we began B. began we C. did we begin D. we would begin

[单项选择]When we have done something wrong, we should______.


A. look honest and think over the fault carefully
B. escape from being disturbed
C. admit the fault and express the regret
D. forgive ourselves

[单项选择]The contract contains basically all we have ( ) during our negotiations.
A. agreed upon
B. agreed with
C. agreed in
D. agreed

[单项选择]______ we have all the materials ready, we should begin the new task at once.


A. Since that
B. Since now
C. By now
D. Now that

[单项选择]All of US have felt pain．We have cut ourselves．We have been burned．Or we have had headaches．Some of us suffer pain rarely pain rarely. ___________ (46) Pain can take complete control of our body and mind，making it impossible to move and even to think．Yet we need pain．Without it，we would not know．1f we have hurt ourselves．It is our body’s warning system. ___________ (47) Pain is the most common reason we go to a doctor It is the most common reason we take medicines．Until recently，however, most doctors knew of only a few drugs that stopped some pains ___________ (48)But new knowledge about the process of pain is helping them to control pain better． Scientists have learned that the sense of pain is made up of both chemical and electrical signals. ___________ (49)Scientists also have learned that the nervous system sends two different kinds of pain messages to the brain：one very fast，the other slow．The first message is the warning signal．It moves at a speed of 30 meters a second．In les