We can do a lot to stay healthy. __________, we should eat a balanced(平衡的) diet.

--Whose backpack is this? ---It            be Jim’s. Look, his student’s card is in it.

－May we start the meeting now?－No, we________ . We__________ to start until the manager comes.

(2013·江西九江二模)If you won't do as I tell you, you ________ get the chance to be promoted because the competition is just too fierce.

 —Listen! Is that Pingping playing the guitar?  —No. It __________be Pingping. He has gone to Beijing.