The article suggests that when a person _________ under unusual stress he should be especially careful to have a well-balanced diet.
| A．is | B．were | C．be | D．was |
The old church ___________the first century A.D. is well preserved.
A. dates back to B. dated back to
C. dating back to D. to date back to
The science of computer, rapid progress has been made in recent years，plays a very important role in our daily life．
| A．from which | B．in which |
| C．with which | D．to which |
— How long do you suppose it is ______ he arrived here？
— No more than half a week.
| A．when | B．before |
| C．after | D．since |
The Foreign Secretary's remarks clarify an _____________ statement issued earlier this week.
| A．ambitious | B．Ambiguous |
| C．amateur | D．arbitrary |
A lot of language learning, ________ has been discovered, is happening in the first year of life, so parents should talk much to their children during that period.
| A．as | B．it | C．which | D．this |