Every means tried but without any result.
| A．have been | B．is to be | C．are to be | D．has been |
I don’t think Jack is a man to be ______ when we are in trouble. He only cares for himself.
| A．relied on | B．familiar with | C．turned to | D．based on |
____ is mentioned above, the number of students in senior high schools is increasing.
| A．What | B．That | C．Which | D．As |
According to a UN report, some 844 animals and plants ______ in the last 500 years.
| A．disappeared | B．were disappeared |
| C．have disappeared | D．had been disappeared |
Seeing their son back home safe and sound, the couple smiled _____.
| A．in peace | B．in relief | C．in return | D．in turn |
Jam Hsiao, a singer from Taiwan, understands that it is his singing, rather than his talking, ______ has got him to where he is now.
| A．which | B．what | C．that | D．as |