by his friends and relations，he decided to send his invention to the patent office to get recognition for his successful idea．
| A．Having pressed | B．Being pressed | C．Pressed | D．To be pressed |
You can depend on whatever promise _______ he makes.
| A．/ | B．why | C．when | D．whose |
.He is not such a man _______ would leave his work half done.
| A．that | B．which | C．who | D．as |
My neigh bours used to give me a hand in time of trouble, _______ was very kind of them.
| A．who | B．which | C．that | D．it |
I want to use the same tools _______used in your factory a few days ago.
| A．as was | B．which was | C．as were | D．which |
I have two grammars, ______are of great use.
| A．all of which | B．either of which | C．both of that | D．both of which |