We ____ last night, but we went to the concert instead.
| A．must have studied | B．might study | C．should have studied | D．would study |
My mother Beijing in a few days？I wonder when the earliest plane on Monday．
| A．1eaves；takes off | B．is leaving；takes off |
| C．is leaving；is taking off | D．1eaves；is taking off |
good，the food was soon sold out．
| A．Being tasted | B．Having tasted | C．Tasting | D．Tasted |
一I like a pen which well．
一Will this one？
| A．writes；work | B．is written，do | C．writes；do | D．is written；work |
After retiring，he was recommended to gardening as a hobby．
| A．take up | B．take on | C．take off | D．take away |
—You ought to have called him yesterday．
—Yes，I know I．
| A．ought to | B．have to | C．should have | D．must have |