Just as the experts _______ it, this kind of material is not natural, but man-made.
| A．get | B．put | C．make | D．mean |
－Why didn’t Susan come to see us yesterday as she promised?
－______.
| A．She must be busy | B．She might have been free |
| C．She must have been busy | D．She can’t be free |
This book is well worth _______. Would you like to buy one?
| A．to read | B．being read | C．reading | D．to be read |
These two words are different _______ each other in spelling while they are similar ______ each other in pronunciation.
| A．from; to | B．from; as | C．with; like | D．with; to |
Don’t forget to take a breath of ______ fresh air and have some exercise each day. It will make ____ difference.
| A．/; a | B．the; a | C．/; the | D．a; the |
--- I’ll be away on a business trip. Would you mind looking after my cat?
--- Not at all. ______.
| A．I’ve no time | B．I’d rather not | C．I’d like it | D．I’d be happy to |