问题

Has Sam finished his report—I have no idea. He _______ it in his office the whole morning.

A:writes
B:has written
C:will write
D:was writing;

正确答案是：

同类题型

My mother ________ me a new bag every year.

Mo Yan’s winning of 2012 Nobel Prize in Literatureshows the world’s ________ of China’s contemporary literature.

Though I can’t make the model ship ____faster, the model plane can be made higher by any of the boyshere.[ ]

Mom used only half of the money, the rest of which ______ saved for other purposes.

You can’t work out this problem ____ inthis way