Jane was asked a lot of questions ,but she didn’t answer ________ of them .
AIDS is said__________the biggest health challenge to both men and women in that area over the past few years.
______ only 20 minutes to go before the train left, I felt uneasy in the taxi to the railway station.
If you can make what the teachers teach ________, you’ll make rapid progress.
_______ has recently been done to provide more buses for the people, a shortage of public vehicles remains a serious problem.
When a giraffe has ______ drink, it has to stand with its front legs wide apart in order to reach ______ water easily.