----- Hi, Tracy, you look tired. ------ I ________ the living room for three hours.
#101812
A
painted
B
had painted
C
was painting
D
have been painting
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Although medical science________control over several dangerous diseases，what worries us is that some of them are recurrent.
#99174
A
achieved
B
has achieved
C
will achieve
D
had achieved
--- Mum, where are my gloves? Is the pair of gloves ______ mine?--- Yes. You have to wear another pair.
#100870
A
washing
B
have washed
C
having washed
D
being washed
I________ an important conference at 10 o’clock this Sunday morning.
#100889
A
will have attended
B
will be attending
C
have been attending
D
have attended
Mr. Brown ______ his office an hour ago and he is still on his way home.
#100172
A
left
B
leaves
C
is leaving
D
was leaving