—May I smoke here?
—If you ________, choose a seat in the smoking section.
| A．should | B．could | C．may | D．Must |
---Why do you look so upset?
---I broke up with my girlfriend. If only I _______ more about her.
| A．care | B．cared | C．had cared | D．had been cared |
Jenny _______ her word. I wonder why she changed her mind.
| A．must have kept | B．can have kept |
| C．should have kept | D．needn’t have kept |
---I’ve told Nancy many times about the meeting, but she still forgot it!
---I understand. Actually, anyone _______ be very forgetful at times.
| A．must | B．should | C．ought to | D．can |
One of the most important questions they had to consider was _______ of public health.
| A．what | B．this | C．that | D．which |
Whatever he does, once he sets up a goal, he would start pursuing it without _______.
| A．hesitation | B．suggestion | C．discussion | D．decision |