Such a problem is＿＿＿＿difficult for a primary school student ＿＿＿.
| A．so； to work | B．very too； to work out |
| C．rather too； to work out | D．quite too； to answer |
The wet weather will continue tomorrow when a cold front ______ to arrive.
| A．is expected | B．is expecting | C．expects | D．will be expected |
—Have you known Dr. Jackson for a long time?
—Yes, since she________ the Chinese Society.
| A．has joined | B．joins | C．had joined | D．joined |
So far this year we ______ a fall in house prices by between 5 and 10 percent.
| A．saw | B．see | C．had seen | D．have seen |
I like these English songs and they ________many times on the radio.
| A．taught | B．have taught | C．are taught | D．have been taught |
—Did you see a man in black pass by just now?
—No, sir. I ________ a newspaper.
| A．read | B．was reading | C．would read | D． am reading |