第二部分:单项填空(共20小题,满分10分)从A、B、C、D四个选项中,选出可以填入空白处的最佳选项,并在机读卡上将该选项标号涂黑。----What does your Mum do? ---- A.She usually stays up late. B.She is cooking. C.My mother is a teacher. D.That’s great!
A computer can only do ________ you have instructed it to do.
—If he ___________, he ________that food. —Luckily he was sent to the hospital immediately.
When a pencil is partly in a glass of water, it looks as if it _______.
One learns a language by making mistakes and _______ them.
_____such heavy pollution already, it may now be too late to clean up the river.