240. It is an important problem. You should________ before you draw a conclusion.

You______buy Tom a present if he invites you to his birthday party.

“ATM” is a short form which ________ “automated teller machine”．[ ]

_ they may have, the CEO of thecorporation calls on all the staff to gather their courage to strive it.

________ you don’t lose heart, I’m sure you can pass the coming examination