The first use of atomic weapons was in 1945, and their power ____increased enormously ever since.
#86339
A
is
B
was
C
has been
D
had been.
推荐题目
About_______ of the books in our school library________ written in English.
#43662
A
one-fifth, are
B
one-fifths, is
C
one-fifth, is
D
first-fifth, are
One or two days ____quite enough to complete the work. ___ you or he going to work with me?
#86049
A
is; Is
B
is; Are
C
are; Is
D
are; Are
Not only the USA and Russia but also China ________ manned satellites to circle the earth.
#85795
A
has sent up
B
has been sent up
C
have sent up
D
have been sent up