.
— I ‘ll ask our physics teacher to explain Newton’s Second Law of Motion, which she taught us yesterday.
— That’s just _______ most of the students haven’t understood.
| A．what | B．why | C．how | D．where |
.It is ________ that people will not agree with what the manager at the meeting.
| A．certainly | B．sure | C．certain | D．surely |
The problem is _______ we can arrive there before 6:00 tomorrow morning.
| A．which | B．whether | C．when | D．that |
The man fled aboard, trying to avoid ________.
| A．catching | B．being caught | C．to catch | D．to be caught |
--- Betty , welcome to my birthday party . Please make yourself at home .
--- ________.
| A．The same to you | B．No , not really | C．Thank you | D．Here you are |
After winning war in Iraq，the country fell into new worries of economy．
| A．the; the | B．a; the | C．the; ／ | D．a; ／ |