People try to save time by using their own cars, and this ________ creates further problems.

The boss________company I worked in two years ago has________in solving such kind of problem

I don’t know if he _______.If he ________ .I will tell you at once.

Can a plane fly _______ the Atlantic Ocean–Yes, but it needs to go _______ the clouds forhours.

hildren, _________ parents are away working inbig cities, are taken good care of in the village