Towards ___________ morning, _________ heavy snow began to fall.
| A．the... a | B．an... a |
| C．a...不填 | D．不填...the |
The fear of failing exams can cause you to panic and stress can be a（n）＿＿＿＿to yourperformance at school．
| A．solution | B．invitation | C．block | D．access |
Heroes are those who，given a choice between doing the right thing at great personal cost or the wrong thing for great personal benefit，＿＿＿＿the former.
| A．choose | B．chosen | C．choosing | D．to choose |
Her last book sold five million copies and we hope this one will be＿＿＿＿popular.
| A．so | B．as | C．such | D．much |
— I need to advertise for a roommate for next term.
—＿＿＿＿？Alicia said she's interested.
| A．Why bother | B．What for | C．Since when | D．How come |
Being a doctor is one of the few professions＿＿＿＿if you make a mistake，it can mean somebody's life．
| A．that | B．which | C．when | D．where |