He tried to cope with the ever-increasing burden of his work, but finally he _____ and had to take a complete rest．
| A．broke in | B．broke down | C．broke out | D．broke up |
Frank put the medicine in a top drawer to make sure it would not be ______ to the kids.
| A．accessible | B．relative | C．acceptable | D．sensitive |
Nowadays people sometimes separate their waste to make it easier for it _______.
| A．reusing | B．to reuse | C．to be reused | D．reused |
Life is like a long race ________ we compete with others to go beyond ourselves.
| A．why | B．what | C．that | D．where |
You must be ________ that what you are doing is quite illegal.
| A．aware | B．confident | C．awful | D．magnificent |
She is organized, friendly to people, hard-working and clever. _______, I can’t speak too highly of her.
| A．In other words | B．In a word | C．As a result | D．In addition |