--- An ant has two stomachs --- one for itself, one for others.
--- Really? Quite interesting. I ____ anything about it.
A. don’t know B. have known C. haven’t known D. didn’t know
AIDS is said__________the biggest health challenge to both men and women in that area over the past few years.
A．that it is B．to be C．that it has been D．to have been
______ only 20 minutes to go before the train left, I felt uneasy in the taxi to the railway station.
A. For B. With C. As D. Because
If you can make what the teachers teach ________, you’ll make rapid progress.
A. yours B. yourself C. you D. your
_______ has recently been done to provide more buses for the people, a shortage of public vehicles remains a serious problem.
A. What B. Though what C. In spite of what D. However what
When a giraffe has ______ drink, it has to stand with its front legs wide apart in order to reach ______ water easily.
A. 不填；不填 B. a; the C. the; 不填 D. 不填；the
