单项选择题

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

When you’re learning to drive, （）a good teacher makes a big difference.
A.and having
B.having
C.and have
D.have

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单项选择题

Do you know the boy（） under the big tree?

A.lay
B.lain
C.laying
D.Lying

单项选择题

Most of the artists （） to the party were from South Africa.

A.had been invited
B.to invite
C.being invited
D.invited