Tom is very happy in China during this period because his Chinese ________ every day. 
#99725
A
has improved
B
is improving
C
improved
D
is improved
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--Can I give you a call on Sunday?-- Sure, but I _______ to the mountains, so call me on my cell phone.
#103558
A
is driving
B
drove
C
have been driving drove
D
will be driving
The leaders of the company are having a meeting to discuss where the new office building __.
#102506
A
should situate
B
should be situated
C
should be lied
D
was located
 Everything he _____ to his country.
#103067
A
had was contributed
B
had been contributed
C
had to be contributed
D
had contributed