35.The writer and professor ______to ______abroad for two years.But no one knows which country he studied in.
A.are said; be studying B.is said; have studied
C.are said; to study D.is said; have been studying
34.Nothing else _____more important than water in the place like a desert.
A.we can’t find B.can’t we find C.can we find D.we can find
33.______all you had done to him, he still treated you so kindly.
A.In spite B.No matter C.Despite D.Although
32.____the problem of land erosion getting more serious, the government is searching for a way to deal with it.
A.As B.With C.When D.If
31.As far as we know, traveling in space has been made ______with the development of science and technology.
A.it is possible B.it possible C.possible D.impossible
30.A: Professor Hopkins didn’t turn up last night, did he?
B: No, we _____for him.A whole night was wasted.
A.needn’t have to wait B.couldn’t have waited
C.needn’t have waited D.didn’t need to wait
29.Don’t disturb me.I ______the letters all morning and ______ten so far.
A.write; wrote B.am writing; have written
C.was writing; wrote D.have been writing; have written
28.Li Ping works hard at his lessons, he didn’t pass the exams last time, ______.
A.though B.yet C.however D.although