If metal is heated and then cooled very quickly, , by dipping in cold water, it will be very hard but will break easily.
| A．what’s more | B．in general | C．for example | D．on the other hand |
He set out for a remote village for ____ he hoped would be a peaceful retirement.
| A．that | B．which | C．what | D．where |
____ to teaching, as we know, contributes to his popularity with his students.
| A．To devote | B．Devoted | C．Being devoted | D．Devoting |
It does not matter that you are a slow walker _____ you never walk backwards.
| A．as long as | B．as soon as | C．unless | D．until |
President Xi appeared in Zhongshan suit in Dutch, ____ displayed the leader's national pride and confidence
| A．as | B．where | C．that | D．which |
Since the sales promotion, all the items _______well.
| A．have been sold | B．were sold | C．had sold | D．have been selling |