By _____ coincidence, oil paints were developed at the time when ____technique of perspective was used.
A. a ; the B \ ; a C. \; the D. a; a
We could see that he was trying to _____ his own responsibility for the delay, instead of accepting his fault.
| A．run over | B．smooth over | C．pass off | D．turn down |
Neither of them thought highly of him and they both tried to _____ him in his work.
| A．hamper | B．support | C．assist | D．encourage |
One _____ needed when making a cake is flour; another is sugar.
| A．container | B．ingredient | C．content | D．equivalent |
The _____ of the trees in the water was very clear.
| A．mirror | B．sight | C．reflection | D．shadow |
The thief _____ the papers all over the room while he was searching.
| A．abandoned | B．vanished | C．scattered | D．deserted |