31The chairman thought ____ necessary to invite Professor Smith to speak at the meeting.
A.that
B.it
C.this
D.him
开始考试练习点击查看答案32I would appreciate _____, to be frank, if goods could be sent to me as soon as possible.
A.you
B.this
C.it
D.that
开始考试练习点击查看答案33The doctor thought _____ would be good for you to have a holiday.
A.this
B.that
C.one
D.it
开始考试练习点击查看答案34I stayed there for only two days but _____ felt like two weeks.
A.it
B.what
C.when
D.then
开始考试练习点击查看答案35His physical disability makes _____ rather difficult for him to find a good job.
A.him
B.that
C.this
D.it
开始考试练习点击查看答案36The two girls are so alike that strangers find _____ difficult to tell one from the other.
A.it
B.them
C.her
D.that
开始考试练习点击查看答案37It never occurred to me _____ you could succeed in per- suading him to change his mind.
A.which
B.what
C.that
D.if
开始考试练习点击查看答案38I would appreciate________, to be frank, if the goods could be delivered as soon as possible.
A.you
B.that
C.it
D.myself
开始考试练习点击查看答案39— Will you see to _____ that all the papers should be handed in after class?— All right.
A.this
B.it
C.me
D.them
开始考试练习点击查看答案40The war made _____ impossible for the scientist to go on with his research.
A.it
B.him
C.this
D.that
开始考试练习点击查看答案