On average, the footprints discovered are 14 to 18 inches long, 5-9 inches wide and much larger than ____ of a human.
| A．that | B．ones | C．those | D．one |
—I really don't know what I ________yesterday without the bike you lent me.
—Glad to have been some help to you.
| A．could do | B．should have done |
| C．had done | D．could have done |
Here was a nice little present for everyone, with a suitable poem ________ to it.
| A．attached | B．attacked |
| C．attracted | D．attributed |
________ no point in beating around the bush. Let's ________.
| A．It's; come straight to the point |
| B．There's; come to the point |
| C．This is; get to the point |
| D．That is; reach the point |
—You didn't wait for Mr. Smith last night, did you?
—Yes, but we ________. He didn't return home at all.
| A．don't have to | B．needn't have |
| C．didn't need to | D．should have |
I remember a _____ famous scientist said that we should believe in ourselves first of all.
| A．some | B．certain | C．sure | D．other |