John seems a nice person. ____, I don’t trust him.
| A．Even though | B．Even so | C．Therefore | D．Though |
.
________ the absence of any further evidence the police were unable to solve the murder.
| A．For | B．From | C．On | D．In |
.
. The chair looks rather hard, but believe it or not, it is very comfortable _____.
| A．sitting | B．to sit | C．sitting on | D．to sit on |
.
It was _____ his mother came in _____ to prepare his lessons.
| A．not until; did the boy begin | B．until; that the boy didn’t begin |
| C．until; did the boy not begin | D．not until; that the boy began |
.
_______ has already been pointed out, grammar is not a set of dead rules.
| A．As | B．It | C．That | D．Which |
.
You should try to _____ new circumstances as quickly as you can
| A．adopt to | B．apply to | C．devote to | D．adapt to |