After the fun he has had during the holidays, the boy can’t ___ on his schoolwork.
| A．try |
| B．concentrate |
| C．take |
| D．depend |
The way ______he looks at problems is wrong.
| A．which | B．whose | C．what | D．/ |
I can never forget the day _______ we worked together and the day ______ we spent together.
| A．when; which | B．which; when | C．what; that | D．on which; when |
I have bought such a watch _______ was advertised on TV.
| A．that | B．which | C．as | D．it |
Last summer we visited the West Lake, ______Hangzhou is famous in the world.
| A．for which | B．for that | C．in which | D．what |
I lost a book, ______I can't remember now.
| A．whose title | B．its title | C．the title of it | D．the title of that |