语法词汇练习 语法大全 语法详解 英语听力 
In the experiment the scientist kept a watchful eye________the developments and recorded every detail.
#28275
A
in
B
at
C
for
D
on
下一题
推荐题目
In the factory, the helmets the workers wore varied _____ color according to their different posts. 
#26057
A
from
B
in
C
with
D
alongside
Due to circumstances ________ our control, the performance has to be canceled.
#25722
A
beyond
B
with
C
within
D
under
He is a man __________ great achievement.
#28453
A
by
B
of
C
in
D
with
He convinced me ______ the difficulty of the work.
#27359
A
on
B
at
C
for
D
of
The railway will be opened______traffic＿＿＿ May 1, 2009.
#28351
A
to； on
B
to； in
C
by； on
D
for； on