It's bad manners to laugh ______ people when they are ______ trouble.

[    ]

　　A. over, in   B. at, in   C. in, at   D. at, for

I think he'll be back in ______ hour.

[    ]

　　A. some   B. a few   C. a   D. an

There are ten pupils in the classroom. ______ of them are Young Pioneers.

[    ]

　　A. Both   B. Either   C. Neither   D. All

The young man ______ the League.

[    ]

　　A. took part in　　    B. joined in

　　C. have taken part in  D. has joined

You have sports for an hour after school every day, ________?

[　　]

The twins are ________ tall ________ strong.

[　　]

The students are all busy ________ the exams.

[　　]

________ of people coming to China for a visit is rising.

[　　]

I' m afraid that she can't come to help you today. You' ll have to turn to ________.

[　　]

When a German buys something ________ a Japanese, or an Indian sells something ________ a Frenchman, they may all use English.

[　　]