She noticed a marked _______ in the children on her second visit.

He couldn't stand _____ for her so long.

He sometimes ____________ sports with friends.

Music can _________ you beat a bad mood or maintain a good mood.

The sports ____________ lasted for 2 weeks in London.

Nylon ______________ in the 1930s

What does she usually do _________ her free time?

If there is a mechanical problem, we suggest ______ the manufacturer directly.

How long ….. you studied English?

Alex is busy _______ for his exams.

Mary was very.........about her final exam. It was a............event because she had not studied well.

You can’t make a comparison between beef and oranges, they are completely ___________ .

If you’ve got a headache, why don’t you try _______an aspirin?

Nobody liked the film, ……………………?

The local government suggested ……. a road through the Nam Cat Tien National Park.

The ...... friendly products are designed not to harm the natural environment.

We are not allowed _______ jeans at school.

Which activities do you think would be difficult ________ blind and deaf people?

He studies _______ his two brothers.

There is a cloth store in front_________ my school.

The panda's ...... habitat is the bamboo forest.