The United States _______one of the lowest smoking rates －25.5 percent of the population.
#103540
A
is
B
have
C
has
D
are
推荐题目
--- Haven’t seen you for ages! Where have you been, anywhere ?--- I _______ to New York City. I just got back.
#99265
A
have been sent
B
was sent
C
had been sending
D
would be sent
Shirley _____ a book about China last year, but I don't know whether she has finished it.
#104131
A
has written
B
wrote
C
had written
D
was writing
Since the project has been ___ on well, you must ___ it on until it is completed.
#101519
A
carrying, carry
B
going, carry
C
going, go
D
carrying, go
I ______ to send him a gift to congratulate him on his marriage, but I _____ it.
#100210
A
hoped; hadn’t managed
B
hoped; didn’t manage
C
hope; don’t manage
D
had hoped; didn’t manage
He _____ football regularly for many years when he was young.
#100315
A
was playing
B
has played
C
played
D
had played