Patient： 500 yuan for pulling a tooth？ It's only a couple of minutes' work．
Doctor： Well， I can do it____if you like．（ ）
A．quietlyB．more slowly
C．less carefullyD．as quickly as I can
Dad，I got hired as a bus driver．
Congratulations!Make yourself ______ so that the company won't want to lose you．（ ）
A．fashionableB．valuable
C．changeableD．possible
Did you see a man in black pass by just now？
No，sir．I ______ my car．（ ）
A．washB．washed
C．am washingD．was washing
I hear you have a home robot．
Yes，it's amazing．It ______ do all my housework．（ ）
A．mustB．shouldC．couldD．can
What will the phone ______？
The same as you said，eight hundred dollars each．（ ）
A．spendB．costC．payD．afford
Hi，guys．Where were we yesterday？
We learned the differences ______ fact and opinion．（ ）
A．betweenB．amongC．duringD．beyond