Many students didn’t realize the importance of study _______ they left school.
| A．when | B．until | C．after | D．unless |
— Must we go there together?
—______ you ________ he goes there, only one student is needed.
A. Both; andB. Either; orC. Neither; nor
— Excuse me, sir, smoking in the gas station.
— Oh, I'm really sorry.
A. doesn't allow B. isn't allowed C. aren't allowed
—Do you often see Johnon the playground?
—No, but he is often seenthe guitar in the park.
A. run; play B. running; to play C. run; to play
—Excuse me, are these books ________?
—No, they aren’t ________. They are ________ classmate’s.
A. his; my; his B. your; mine; his C. yours; mine; my
—I hear Michael never tells________ lie.
—That's right. He always tells ________truth. He is ________ honest boy.
A. a；the；an B. a；an；the C. an；the；a