In doing scientific experiments one must be _______ careful with the instruments.
| A．other than | B．rather than | C．less than | D．more than |
She stepped into the bedroom quietly _____she might wake up her roommates.
| A．for fear that | B．so long as |
| C．on condition that | D．in order that |
—He_______to the meeting. Have you informed him of it?
—Sorry. I _______to.
| A．hasn’t come; am going | B．didn’t come; have forgotten |
| C．hasn’t come; forgot | D．doesn’t come; will have |
It is not enough only_______the rules of grammar if you want to learn English well.
| A．keeping in the mind | B．to keep in mind |
| C．to keep in your mind | D．keeping in your mind |
He _______the person referred to be put in prison.
| A．said | B．demanded | C．agreed | D．thought |
________you I owe a thousand apologies
having doubted your ability.
| A．For; to | B．To; for | C．For; for | D．To; to |