Criticism and self-criticism _____ necessary _____ it helps us to correct mistakes.
| A．is, in that | B．are, in that | C．is, in which | D．are, at that |
The experts advise _______ our army _______ modern weapons.
| A．to equip; with | B．equipping; with |
| C．to equip; for | D．equipping; for |
It ______ at the crossroads ______ he was killed in the acciden
t the other day.
| A．is; which | B．was; that |
| C．is; where | D．was; where |
The flowers ______ my mother, but my sister thought they were for her and took them.
| A．were intended for | B．intended for |
| C．intended to give | D．intended giving |
He sent me an e-mail, ________ to get further information.
| A．hoped | B．hoping | C．to hope | D．hope |
At home, he keeps some pets，to which he ______ all his spare time.
| A．spends | B．offers | C．devotes | D．provides |