问题

How much do you know about the 3D film technology?— A little. Not until the hot movie Avatar some about it.

A:did I see; did I begin to learn
B:egan to learn
C:I saw; did I begin to learn
D:did I see; I began to learn

正确答案是：

同类题型

Will Mr Wang offer us a hand— He ____ be glad to He never refused ourrequest

There ______ great changes in our city in the last ten years.

I saw no more than one motor-car in that shop. Will you go and buy _____— No, I’d rather find _____ in other shops.

When do you usually get up, Xiaoli–____ 6:30 in the morning.

Some teenagers _______ their health because they often expose themselves to so many electric products