问题

When you’re learning to drive, _____ a good teacher makes a big difference.

A:have
B:having
C:and have
D:and having

正确答案是：

同类题型

You can’t work out this problem ____ in this way.

do you study English— I study English by reading aloud every morning.

How can you expect to get everything ______ you never give?

He _______ busy yesterday, or he _______ you with your experiment.

Most people advisethat students’ heavy burden __________.