It was snowing hard and Mother told me to put on a thick coat to ______myself from the cold.
#100898
A
Prevent
B
save
C
explore
D
protect
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I first met Mr. Smith in America. He ______ at Stanford University then.
#104105
A
studied
B
has studied
C
is studying
D
was studying
The meeting        for two hours,but they still       any agreement.
#102274
A
has been going on;haven’t reached
B
has been going on; haven’t been reached
C
was going on; haven’t reached
D
was going on; haven’t been reached
--- Have you finished the report? --- No. I ______ it all this week.
#104275
A
will do
B
had done
C
have done
D
have been doing