My deskmate is still a puzzle to me; at one moment he is quiet while at another he _____ be quite active.
| A．can | B．must | C．should | D．would |
There was such long queue for coffee at the interval that we ________ gave up.
| A．eventually | B．unfortunately | C．generously | D．purposefully |
— Must I turn off the gas after cooking ?
— Of course . You can never be____careful with that .
| A．enough | B．too | C．so | D．very |
－Is your headache getting_____________?－ No, it’s worse.
| A．better | B．bad | C．less | D．well |
David has won the first prize in singing; he is still very excited now and feels________ desire to go to bed.
| A．the most | B．more | C．worse | D．the least |
--- How is everything going on with you in Europe?
--- Quite well. Not so smoothly as I hoped, _______.
| A．though | B．instead | C．either | D．too |