6.He has two other shirts ___this.

6.He has two other shirts ___this.
A.except B.except hat C.besides D.beside
7.The Great Wall runs across North China and ___ the sea at last.
A.arrives B.reaches for C.gets D.reaches
8.He used ___on the right in China,but he soon got used ___on the left in English.
A.to drive,to drive B.to drive,driving C.driving,to drive D.to drive,to driving
9.I will not go___ I hear from him.
A.unless B.if C.once D.when
10.___ is the population of your country.
A.How much B.How many C.Which D.What
11.Let’s go swimming,____?
A.will you B.don’t we C.are we D.shall we
12.They left Beijing ___a very hot summer afternoon.
A.on B.in C.during D.by
13.He had his radio ___last Sunday.
A.repairing B.have repaired C.to repair D.repaired
14.I can hear the Browns' phone bell ring but no one is answering it; they _____be at home.
A.can't B.mayn't
C.probably not D.shouldn't
15.I mean ______you—how’s your mother?
A.asking B.ask C.being asked D.to ask
16.While I was skiing,I ______ and broke my wrist.
A.fell B.felt C.feel D.fallen
17.It wasn't an accident.He did it on ______
A.reason B.determination C.purpose D.intention
18.His ears are highly sensitive ______any unusual sound in the machine.
A.of B.on C.to D.by
19.When they had finished playing,the children were made to ______all the toys they had taken out.
A.put off B.put up C.put out D.put away
20.I only came to thank you and return the book you ______me.
A.borrow B.borrowed C.lend D.lent
如果能详细写出没道题为什么这么做
麻烦问一下第8句的解释 on the