--- Do we have to hand in our research reports this afternoon, Professor Smith?
--- Yes, you _______ . I will be waiting to check them all the afternoon.
| A．should | B．may | C．can | D．must |
It was along the Mississippi River _________ Mark Twain spent much of his childhood.
| A．how | B．which | C．that | D．where |
In 1938, Hitler _________ war against Poland, which started the Second World War.
| A．declared | B．stated | C．broadcast | D．advertised |
A serious earthquake struck the village, __________ many people homeless.
| A．to cause | B．caused | C．causing | D．cause |
The old woman _____ her sons and daughters _______ and see her soon.
| A．suggested; to come | B．hoped; to come |
| C．urged; coming | D．urged; to come |
The pretty girl is always busy helping her mother with the housework _________ I go to visit her family.
| A．every time | B．every time when | C．at every time | D．however time |