________ with some research materials, he decided on three possible approaches in his experiment.
#90081
A
Preparing
B
Prepared
C
Having prepared
D
Prepare
推荐题目
I would like _____you to my birthday party,but I was busy and forgot to call you.
#97834
A
to invite
B
inviting
C
to have invited
D
having invited
—What’s made you so upset? — with my best friend.
#97042
A
Quarrel
B
Quarrelling
C
Because of quarrelling
D
Since I quarreled
It is no use _________ to persuade him ________ smoking because he has been addicted to it since he was young.
#95554
A
trying, to quit
B
to try, to quit
C
to try, quit
D
trying, quit
—I regret____ to tell ____you that John has been fired.—I can hardly believe my ears. He is such a fine worker.
#90836
A
telling
B
having told
C
to tell
D
to have told
We’re advised not to leave the water ______ after using it.
#88702
A
run
B
running
C
to run
D
having run