The computer was invented in the 1940’s and ______ quite a lot ever since.
| A．was changed | B．had changed |
| C．has been changed | D．will change |
Finally, the young explorer, through a series of lucky accidents, arrived ______ was so-called the valley of death by the locals.
| A．where | B．what | C． in which | D．in what |
The police and the locals joined together to look for the missing boy, ______
his families a ray of hope.
| A．gave | B．to give |
| C．giving | D．having given |
While people enjoy great convenience modern life brings, the living conditions in the mountain village are still quite ______.
| A．negative | B．subjective |
| C．positive | D．primitive |
—We might as well try our best before quitting.
—______! We should give it a try!
| A．You said it | B．You name it |
| C．You deserve it | D．You got it |
I will spend a whole evening _____ in your room waiting for the thief to arrive.
| A．locking | B．in locking |
| C．being locked | D．locked |