One can’t do extreme sports _________ he or she has had some training.
| A．if | B．unless | C．once | D．since |
The old farmer’s eyes still shone bright in the wrinkled brown face and his step as he came across the room was ________, though slow.
| A．shaky | B．heavy | C．casual | D．steady |
—Well, Toby. I remember that you had a very…how should I say…relaxed attitude toward work at the bookstore.
—__________! I was a model worker!
| A．No way | B．No doubt | C．No wonder | D．No problem |
－I’m thinking of the test tomorrow. I’m afraid I can’t pass this time.
－ ! I’m sure you’ll make it.
| A．Go ahead | B．Cheer up | C．No problem | D．Good luck |
The people in the disaster areas are ready to accept _______ help they can get.
| A．whichever | B．however | C．whatever | D．whenever |
I like the book so much that I'll buy it, _______.
| A．no matter how it may cost | B．how may it cost |
| C．how much may it cost | D．however much it may cost |