Scientists from different countries are trying to_______ a good way to solve the energy problem.

Scientists from different countries are trying to_______ a good way to solve the energy problem.

#56513

keep up with

come up with

catch up with

meet up with

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Could you please           the dishes?

#58592

to do

to make

makes

I ________ a student and Miss Liu ________ my teacher.

#57168

am,is

is,is

am,are

is,are

—— What’s wrong with Tom? —— Bad luck! Tom     his bike and hurt his leg.

#55562

fell

fell off

fell down

fell behind

 I enjoy _____ to learn their different tradition and cultures.

#52028

travel

travelling

travels

to travel

Lucy prefers ________ to __________.

#61741

to walk, jogging

walk, jog

to walk, jog

walking, jogging

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