The beautiful scenery in Switzerland is very ________to the tourists from the whole world.
| A．grateful | B．attractive | C．valuable | D．popular |
A warm thought suddenly came to me________I might use the pocket money to buy some flowers for my mother's birthday。
| A．if | B．when | C．that | D．which |
--- It’s thirty years since we last met.
--- But I still remember the story, believe it or not, _________we got lost on a rainy night.
| A．which | B．that | C．what | D．When |
makes this shop different is that it offers more personal services.
| A．What | B．Who | C．Whatever | D．Whoever |
We haven't settled the question of ______________ it is necessary for him to study abroad.
| A．if | B．where | C．whether | D．that |
With his work completed, the businessman stepped back to his seat, feeling pleased_____ he was a man of action.
| A．which | B．that | C．what | D．whether |