Tim is weak in math, so he is trying _________ up with other students now.
| A．to catch | B．catch | C．catching | D．caught |
—How about this black bike？—Pretty well ！ I don’t think I can find a _______one
A. good B.better C. best
—We will hold a wonderful picnic for you when Chidren’s Day 。
A. comes B.will come C. is coming
—Peter ， give up smoking now_______，your body will become weaker
A. or B. and C. but
—Is this Toby’s iPhone5，Jenny ?
—No，it________be his. His is black
A. muctn’t B. can’t C. may not.
—Which do you think is better，tomatoes or potatoes —_______of them are delicious
A. All B. Either C. Both