Dr Brown has the habit of _____ the room when he is thinking about something troublesome.
| A．pacing | B．stepping | C．walking | D．marching |
______ such heavy pollution already, it may now be too late to clean up the river.
| A．Having suffered | B．Suffering | C．To suffer | D．Suffered |
As we joined the big crowd I got ______ from my friends.
| A．separated | B．spared | C．lost | D．missed |
—Did you see a man in black pass by just now?
—No, sir. I ________ a newspaper.
| A．read | B．was reading | C．would read | D． am reading |
It is reported that two schools，________ are being built in my hometown，will open next year.
| A．they both | B．which both |
| C．both of them | D．both of which |
Peter received a letter just now ________ his grandma would come to see him soon.
| A．said | B．says | C．saying | D．to say |