He found very difficult the math problem．

He found           very difficult           the math problem．

#52196

that；to solve

this；solving

it；to solve

it；solving

推荐题目

Don’t leave your books on the table. Please________.

#59873

take away it

take it away

take away them

take them away

Would you like ________ for a walk after supper?

#54584

going

to go

went

Thanks for ______ me to your party．

#61309

ask

have

asking

to ask

—Jack, what do you usually do after supper? --Well, I____ stay at home and watch TV, but now I ____ taking a walk.'

#60383

used to, used to

used to, am used to

am used to, used to

am used to, am used to

We’ll go for a picnic if it _______this  Sunday .

#54013

won’t rain

isn’t raining

doesn’t rain

don’t rain

共5907题