Boys enjoy_____basketball on the playground.

Scientists say it may be five or six years it is possible to test this medicine on human patients.[ ]

Your son used to be a homebody but he now likes outdoor activities. How did you do that-I tried many ways over and over again. _______ ,I made it.

(2013·高考福建卷)The Forbidden City attracts a ________ stream of visitors every day，especially during national holidays.

edwith his sister, Jerry is even more to,and more easily troubled by , emotional and relationship problems