---Is there anything wrong, Bob? You look sad．
---Oh, nothing much．In fact, I ____ of my friends back home．
| A．have just thought | B．was just thinking |
| C．would just think | D．will just be thinking |
You can’t imagine the trouble we had ____ in touch with him.
| A．got | B．to get | C．get | D．getting |
____ this car with that one, he chose the latter.
| A．Comparing | B．Compared |
| C．To compare | D．Compare |
He claims to _____ a round black creature moving quickly through the water.
| A．see | B．have seen |
| C．be seen | D．be seeing |
She ____ have left school, for her bike is still here.
| A．can’t | B．mustn’t |
| C．needn’t | D．shouldn’t |
They are ____ different sizes, shapes and materials, but they are exactly the same _____.
| A．/; in weight | B．of; in weight |
| C．in; of weight. | D．of; weights |