The toughest thing about success is _______ you have to keep on being a success.
| A． that | B．when | C．what | D．why |
— I’m afraid what I did cannot satisfy your requirements.
— _____. At least you tried.
| A．I don’t believe it. | B．Don’t say so. |
| C．Never mind. | D．It was not your fault. |
While _____ music is just so-so, _____ story in this TV play is quite moving.
| A．/; a | B．the; the | C．the; / | D．/; the |
The user also wears special gloves to ‘touch’ the people and objects _______ he or she sees.
| A．who | B．which | C．that | D．what |
The traditional view is ______ we sleep because our brain is “programmed” to make us do so.
| A．when | B．why | C．whether | D．that |
My friend Jack has just sent me an e-mail, _______ me about his travels around the world.
| A．tells | B．told | C．telling | D．to tell |