.We will learn how to operate the machine _______.
#4731
A
at a time
B
at one time
C
at the time
D
in time
推荐题目
It’s the second time that I _______ in Beijing. What great changes! It’s years since I ________ here last time.
#4823
A
went; had left
B
had been; left
C
have been; left
D
have; had left
.As I grew up in a small town at the foot of a mountain, the visit to the village_____ scenes of my childhood.
#4760
A
came up
B
called up
C
took up
D
made up
Some people who don’t like to talk much are not necessarily shy；they ______ just be quiet people.
#4938
A
must
B
may
C
should
D
would
John and Mary’s room _______ on fire. Many _______ help them put out the fire.
#4682
A
are; passer-bys
B
is; passers-by
C
is; passer-bys
D
are; passers-by