求英语答案321._______ a reply,he decided to write again.( D ) A.N

求英语答案3
21._______ a reply,he decided to write again.( D )
A.Not receiving
B.Receiving not
C.Not having received
D.Having not received
22.That T-shirt was so tight that he decided to have it _______.( C )
A.be enlarged
B.enlarge
C.enlarged
D.to enlarge
23._______ at such a time,his work attracted much attention.( C )
A.To publish
B.Published
C.Publishing
D.To be published
24._______ from space,we can find that our earth looks like a“blue planet”.( B )
A.Seen
B.Seeing
C.Having seen
D.To see
25.The manager has his employees _______ a business report every week.( B )
A.to write
B.written
C.writing
D.write
26.I found _______ pleasant walking along the river after supper.( C )
A.this
B.that
C.it
D.which
27.You’d better take an umbrella with you _______ it should rain.( A )
A.in case of
B.in case
C.because
D.when
28._______ you have decided to get married,you should shoulder the family responsibilities.( B )
A.Although
B.Once
C.Or
D.Unless
29.It _______ that I met one of my old classmates on my way home yesterday.( D )
A.took place
B.occurred
C.broke out
D.happened
30.The old woman next door is very keen _______ growing roses.( A )
A.to
B.with
C.on
D.at