—This returned Chinese scholar has become one of the top experts in this field.—Yes , I know him very well. He ___________ in Africa with wild animals for eight years.
#104287
A
has worked
B
had worked
C
worked
D
has been working
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-—David has gone to Australia on business.—Really? I ______ why he was absent from today’s meeting.
#101832
A
am wondering
B
wonder
C
was wondering
D
had wondered
---I for London to attend a meeting tomorrow. The plane at 10:20 am. ---Have a good journey!
#101727
A
am leaving; leaves
B
leave; leaves
C
am leaving; is leaving
D
leave; is leaving
The Russian rocket designer has died. For many years, he ______ as an important assistant to the father of Soviet space program.
#101576
A
serves
B
was serving
C
served
D
has served
The houses . They will be finished next year.
#102266
A
are built
B
have been built
C
are being built
D
were built