Martin Cooper , a US researcher , was considered _______ the first cell phone .
#96873
A
invented
B
to invent
C
having invented
D
to have invented
推荐题目
Before traveling in space, you must know what it might feel like_____in an imaginary environment.
#98721
A
to travel
B
traveling
C
to be traveling
D
travel
______ to reach them on the phone, we sent an email instead.
#92649
A
Fail
B
Failed
C
To fail
D
Having failed
The purpose of new technologies is to make life easier, _______ it more difficult.
#98627
A
not make
B
not to make
C
not making
D
do not make
The boy is running impatiently here and there as if____ something lost on the sports ground.
#95456
A
to search
B
searching
C
searching for
D
to search for
He advised _____ a meeting _____ the problem.
#98311
A
holding；to discuss
B
holding；for discussing
C
to hold；to discuss
D
hold；discussing