--- You didn’t hear me until now?
--- No. I must ___________ soundly(沉) when you came in.
| A．have slept | B．be sleeping | C．sleep | D．have been sleeping |
Certainly I posted your letter — I remember ______ it.
| A．posting | B．to post | C．to be posting | D．have posted |
Please remember _______ the plants while I’m away.
| A．watering | B．to be watering | C．to water | D．being watering |
Please excuse me _______ your letter by mistake.
| A．to open | B．to have opened | C．for opening | D．in opening |
After describing the planned improvements, she went on _______ how much they would cost.
| A．to explain | B．explaining | C．to be explaining | D．having explained |
The film star walked to his car, ______ a crowd of journalists.
| A．followed by | B．following by | C．to follow | D．to be followed by |