Air pollution is getting serious in big cities in the world.

The sentence 1, 2, 3, 4 in the following paragraph are in the wrong order. Choose the correct order to...

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is best made...

They/ not answer/phone/ this morning, so/ must/ out/. A. They hasn't answered the phone this morning so they must have...

Left-handers are the odd ones out. Sure, lefties (31) ______up about 10 percent of the population - but, frankly, it...

What (32) ______someone to become a lefthand? A. causes B. makes   C. gets   D. does ...

Scientists aren’t exactly sure, but research points to a complex (33) ______between genes and environment While no exact set of...

But no matter (34) ______it is that drives someone to use their antipodal paw, science has also uncovered a particular...

So for all of you lefties, leftie-loving righties, and ambidextrous folks out there - it’s time to brush up on...

People can live only a few days (44) _____ it. A. in B. without C. for D. with ...

Both industrial nations and less-developed countries are worried about the (45) ______ and quantity of water in the world. A....