________ you want to go out during a lecture, what should you do? A. As B. If C. Though D. When

If we start the new project, we ________ more staff. A. will need B. need C. would need D. needed

________ here, he would help us with these troubles. A. Were our father B. If our father had been C. Was our father D. Unless our father were

________ people had not cut so many trees. A. If B. If only C. Unless D. Even if

If she ________ me, tell her to leave a message. A. calls B. will call C. called D. would call

John will pick me up ________. A. in case it rained B. if it rains C. provided that it would rain D. unless it rained

________ as much money as Bill Gates of Microsoft, I would retire. A. If I had B. If I have C. Unless I had D. If I had had

If it ________ tomorrow, I will not have to water the plants. A. will rain B. is raining C. would rain D. rains

________ more carefully, he would not have had the accident yesterday.

If John ________ 10 years younger, he ________ for the Job. A. is / will apply B. was / has applied C. had been / will have applied D. were / would apply

________ he arrives soon, we will have to start the conference without him. A. Suppose B. Provided C. Unless D. If

You will not be allowed to attend the club meeting ________ you are a member. A. unless B. if C. providing that D. supposed that