It’s uncertain _______ side effect the medicine will bring about , although about two thousand patients have taken it ．
| A．that | B．what | C．how | D．whether |
You can be ______ success, but you don’t need to be ______ Bill Gates to be successful.
| A．a; a | B．the; / | C．the; the | D．/; the |
—Can I pay by credit card?
—Yes, _________.
| A．with pleasure | B．take care | C．no problem | D．don’t mention it |
There was only one ____ of transportation in this mountainous area five years ago.
| A．mean | B．means | C．meaning | D．way |
He ____ the explosion, but no one else did. How lucky he was!
| A．survived | B．saved | C．lived | D．stayed |
____ they did not believe him, what would they do then?
| A．Suppose | B．Supposed | C．I suppose | D．You suppose |