In class, the students are __________ in the teacher’s words.
| A．losing | B．absorbed | C．attracted | D．addicted |
Several weeks had gone by _______ I knew the painting was missing.
| A．as | B．since | C．until | D．before |
Mr. Alexander doesn’t just write for fun; _______, writing is his bread and butter.
| A．at last | B．in fact | C．in a word | D．as a result |
He sent me an e-mail, ________ to get further information.
| A．hoped | B．to hope | C．hoping | D．hope |
---Mr. Smith must know a lot about Chinese history.
---________. He has studied it for years.
| A．So he does | B．So does he | C．So he must | D．Yes, he must |
While watching television, ________.
| A．the doorbell rang | B．the doorbell was rung |
| C．we heard the doorbell ring | D．we heard the doorbell rings |