In my opinion，his suggestion__________right or not，should be considered.
| A．if | B．which | C．when | D．whether |
_______ the new paints and the new technique, we would not be able to see the many great masterpieces for which this period is famous.
| A．Were it not | B．Had it not been for |
| C．Were there not for | D．Were there not |
It is the discovery of Cao Cao’s tomb, _____ was made in Anyang, Henan province, _____ has received widespread attention.
| A．where; which | B．where; that |
| C．that; which | D．which; that |
Tom does speak Chinese well, but his reading and writing skills leave much ______.
| A．to improve | B．to be improved |
| C．being improved | D．having improved |
Although Rio knew little about marketing, he succeeded ______ other more well-informed managers failed.
| A．as | B．unless | C．what | D．where |
It is required that under no circumstances ______ betray ourselves even if there are temptations like money or beauty.
| A．we will | B．should we |
| C．we should | D．we shall |