1.my sister's professor had her ( ) paper many times before allowing her to present it to the committee.
A. rewritten B.to rewrite C.rewrite D.rewritting
2.It is always risky ( ) the business.
A,to start B.starting C.started D.being starting
3. it was essential that the application forms ( )back before the deadline.
A.be sent B.would be sent C.must be sent D.were sent
1.C have sb do sth....固定搭配，让某人做某事
2.B be risky （in）doing sth.也是固定搭配，做某事很危险
3.A .it was essential 后面的从句要用should do（be）形式，should可以省略，所以用原型be sent
希望能帮到你，祝你开心，进步^_^，有问题给我留言哦追问
2.B be risky （in）doing sth.也是固定搭配，做某事很危险
3.A .it was essential 后面的从句要用should do（be）形式，should可以省略，所以用原型be sent
希望能帮到你，祝你开心，进步^_^，有问题给我留言哦追问
ten dollars will ( ) the cost of the damage.
A.cover B.spend c.pay for D.take
A，cover有覆盖的意思，这里引申为可以支付开销（覆盖掉），cover the cost （of..）是一种cover比较常用的一种用法，要记住哦 ^_^，意思是够。。。的开销
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