_____ there is little we can do to modify the weather, we can at least know what kind of weather to expect.
| A．While | B．When | C．If | D．Whether |
The blues has been _____part of African-American culture since then, and it is still ______ important part of American culture.
| A．a; a | B．/ ; an | C．the ; a | D．/ ; a |
-- We’re organizing a party next Saturday, and I’d like you to come.
-- _______! I have another one that day. Thank you just the same.
| A．Good luck! | B．What a pity! | C．Never do it again! | D．Well done! |
Can you think of a _____ in which you could use this expression.
| A．situation | B．condition | C．state | D．matter |
– What do you think of the book ?
-- Oh, excellent. It’s worthy ______ a second time.
| A．to read | B．to be read | C．being read | D．to being read |
It was some time _____ we realized the truth.
| A．when | B．until | C．since | D．before |