The past two years ________ a sharp rise in oil price, which adds to the burden of auto transportation industry.
#101865
A
witnessed
B
has witnessed
C
is witnessing
D
witnesses
推荐题目
—Look! Somebody ______the blackboard．—Well, it wasn't me．I didn't do it．
#101314
A
is cleaning
B
was cleaning
C
had cleaned
D
has cleaned
---Can we sit at the table near the window?---I’m sorry, but it______ already.
#101085
A
was taken
B
has taken
C
has been taken
D
has been taking
—Tommy is planning to buy a car.—I know .By next month ,he enough for a used one
#99632
A
saves
B
saved
C
will save
D
will have saved
Tony ________ for the company as an engineer for two decades. Now he teaches mechanics in Peking University.
#100949
A
has worked
B
worked
C
is working
D
had worked
____________better ways for digging tunnels__________, the first railway tunnel under the River Thames was dug in 1884.
#100801
A
As , developing
B
With, developed
C
As , were developed
D
With, development