求英语单选答案2,请帮助看看这10题有哪些是错的并帮忙改正

求英语单选答案2,请帮助看看这10题有哪些是错的并帮忙改正
11.He was _______ all of his best friends.( C )
A.laughed by
B.laughed at
C.laughed at by
D.laughing at
12.After the Minister of Education had finished speaking at the press conference,he was made _______ all sorts of awkward questions.( A )
A.answer
B.answering
C.answered
D.to answer
13.The roof of our house is broken,so it needs _______.( A )
A.repaired
B.repairing
C.being repaired
D.to repair
14._______ a teacher in a university,it is necessary to have at least a master’s degree.( A )
A.To become
B.Become
C.One becomes
D.On becoming
15.The doctor advised her _______ enough rest before going back to work.( B )
A.get
B.to get
C.gets
D.got
16.The workers are busy _______ models for the exhibition（展览）.( D )
A.to make
B.with making
C.being making
D.making
17.He spoke so loudly _______ be heard by all.( C )
A.that could
B.in order
C.as to
D.to
18.It is necessary _______ a foreign language.( B )
A.of college students to master
B.for college students to master
C.that college students master
D.that college students to master
19.Henry would never forget _______ his mother-in-law for the first time.He was so pleased with the gifts she brought for him.( C )
A.meet
B.to meet
C.meeting
D.met
20.Do you know the man _______ under the apple tree?( C )
A.lay
B.lain
C.lying
D.laying