[单项选择]“This certificate is valid for six months from the date of issue．”，最确切的翻译是( )
A. 本证书自即日起，有效期为6个月
B. 本证书在6个月内有效
C. 本证书自签发之日起，有效期为6个月
D. 本证书自领证之日起，有效期为6个月

[单项选择]“This certificate is valid for six months from the date of issue”最确切的翻译是( )。
A. 本证书自即日起，有效期为6个月
B. 本证书在6个月内有效
C. 本证书自签发之日起，有效期为6个月
D. 本证书自领证之日起，有效期为6个月

[单项选择]“This certicate is valid for six months from the date of issue．”，最确切的翻译是（）
A. 本证书自即日起，有效期为6个月
B. 本证书在6个月内有效
C. 本证书自签发之日起，有效期为6个月
D. 本证书自领证之日起，有效期为6个月

[填空题]To babies from birth to six months of age, the preferred food is______as it contains many protective and immunological factors.

[简答题]Drafts are usually valid for 6 months. This draft expires on Nov. 10. It is the first of November. I’m not sure whether the draft can reach the paying bank at the maturity date.

[单项选择]His （）with computers began six months ago.
A. imagination
B. innovation
C. observation
D. obsession

[简答题]John got married six months ago, and like many young people these days, they are struggling to make a home at a time when the cost of living is very high.

[简答题]It has been more than six months since we had the opportunity to serve your car, and we’ve missed you. So, we are inviting you to bring your car into our shop for a free inspection and adjustment. We hope that you will accept our offer. We have set aside the hours between 8:00 a. m. and 1:O0 p. m. , Monday through Friday for your convenience.

[单项选择]We had a really bad time about six months ago but now things are（）
A. looking up
B. coming up
C. making up
D. turning up

[单项选择]The study group （）studying German for six months now
A. is   
B. has
C. was   
D. has been

[单项选择]Watch a baby between six and nine months old, and you will observe the basic concepts of geometry being learned. Once the baby has mastered the idea that space is three-dimensional, it reaches out and begins grasping various kinds of objects. It is then, from perhaps nine to fifteen months, that the concepts of sets and numbers are formed. So far, so good. But now an ominous development takes place. The nerve fibers in the brain insulate themselves in such a way that the baby begins to hear sounds very precisely. Soon it picks up language, and it is then brought into direct communication with adults. From this point on, it is usually downhill all the way for mathematics, because the child now becomes exposed to all the nonsense words and beliefs of the community into which it has been so unfortunate as to have been born. Nature, having done very well by the child to this point, having permitted it the luxury of thinking for itself for eighteen months, now abandons it to the arbitrary c
A. Picking up a wooden block.
B. Recognizing the number 2.
C. Uttering a nonsense word.
D. Looking at distant objects.