In the past twelve months the research members ______ the effectiveness of many materials in a home building.
#102889
A
had studied
B
would study
C
studied
D
have studied
推荐题目
Our friendship ______ quickly over the weeks that followed.
#102151
A
had developed
B
was developing
C
would develop
D
developed
—Why were you so late this morning? —I _____ in heavy traffic for an hour on the way here.
#101422
A
have been caught
B
have caught
C
had caught
D
was caught
The young boy has come to himself in hospital now. But he ___ unconscious for three days.
#99850
A
has been
B
was
C
had been
D
is
He collected information on 1,000 people, whose IQ when they were ten years old.
#102201
A
is tested
B
has tested
C
would test
D
had been tested
This kind of glasses manufactured by experienced craftsmen ______ comfortably.
#101226
A
is worn
B
wears
C
wear
D
are worn