____ hard you try, it is difficult to lose weight without cutting down the amount you eat.
| A．However | B．Whatever | C．Whichever | D．Whenever |
You can tell him everything，as he is a man who you can _____ on.
| A．rely | B．attach | C．perform | D．affect |
Susan advised me not to buy the vase, but I bought it _____.
| A．anyhow | B．however | C．though | D．Totally |
The two top students in Mr. Green’s class competed _____ each other for the highest marks.
| A．to | B．for | C．in | D．Against |
Everyone has periods in their lives________ everything seems very hard.
| A．when | B．where | C．which | D．That |
—How about camping this weekend，just for a change?
—OK，________you want.
| A．whichever | B．however | C．whatever | D．Whoever |