问题

She always watches her son ________ the road everymorning, or she will feel worried.
A: crossing
B:cross
C:to cross
D:to crossing
B:cross
C:to cross
D:to crossing
正确答案是:
同类题型
Flight331 _____I’dbetter be on my wayGoodbye—ByeHappy landing!
Hardly ______ to the airport ______ he was surrounded by many journalists and fans.
The sign reading "NoPhotos" means that no one ____ take any photos in the Palace Museum
_______ impressed me was the boy’s ability to dealwith this kind of difficult physics problem.