_____ unemployment and crime are high, it can be assumed that the latter is due to the former.
| A．Before | B．Where | C．Unless | D．Until |
You can eat food free in my restaurantyou like.
| A．whenever | B．wherever |
| C．whatever | D．however |
—when has the country been open to international trade? —1978，I suppose.
| A．Since | B．In | C．From | D．After |
With the rapid growth of population, the city ____ in all directions in the past five years.
| A．spreads | B．has spread |
| C．spread | D．had spread |
----I wonder if you could go with me to the cinema.
----Don’t disturb me. I ____ a composition all the morning and haven’t finished yet.
| A．write | B．was writing |
| C．have written | D．have been writing |
I ____ to send him a telegram to congratulate him on his marriage, but I ____ it.
| A．hoped, hadn’t managed | B．has hoped, didn’t manage |
| C．hope, don’t manage | D．had hoped, didn’t manage |