问题

By using ears one can tell the direction ____ a sound comes.

A:in which
B:yfrom which
C:with which
D:through which

正确答案是：

同类题型

This means that for the first time doctors may be able to tell if an infected（被感染的）person who feels well is ________ becoming ill, so that they can try to do something to prevent this

There are 40 students in our class. ______ of them, about 35, sleep 8 hours every night.

Tony thinks it is easy _________ English.

1—What do you think of theshow “Happy Camp”?—________. Iwatch it on TV every week.

Qingdao is one of citiesin China.