By the end of last year, they _______ 2,000 English words.
#36368
A
learned
B
have learned
C
had learned
D
learns
推荐题目
Inthepast few years,thousandsoffilms     all overtheworld.
#40491
A
have produced
B
have beenproduced
C
are producing
D
are beingproduced
The fishermen knew little about the island when they     there.
#42792
A
arrived
B
would arrive
C
arrive
D
have arrived
—Is Mike at home?—No. He _______ with his brother. 
#38010
A
swims
B
was swimming
C
is swimming
D
swam
Mr. Wu___this math problem____him many times, but he still doesn’t understand it.
#38768
A
explains ; to
B
has explained ; for
C
has explained ; to
D
explained ; with
---      you      the film before? ----Yes, I      it last year.
#42007
A
Did ; see ; saw
B
Have ; saw; saw
C
Have; seen; saw
D
Have; seen; seen