He is very sick. I insist that a doctor __________ immediately.
#102576
A
has been sent for
B
sends for
C
will be sent for
D
be sent for
推荐题目
Hi, Jim. _________ seen you for ages. I really _______ see you here.
#103387
A
Haven’t, don’t expect
B
Haven’t, didn’t expect
C
Hadn’t, hadn’t expected
D
Hadn’t, wasn’t expected
Millions of pounds’ worth of damage _____ by a storm which swept across the north of England.
#100797
A
has been caused
B
had been caused
C
will be caused
D
will have been caused
 By the time he was twelve he ______ a chemistry lab of his own.
#104127
A
built
B
has built
C
had built
D
was building
In the past decades, sea ice _____in the Arctic as a result of global warming.
#102142
A
had melted
B
has been melting
C
melted
D
is melting