____my grandpa is over 80 years old， he still looks strong and healthy．（ ）
A．AlthoughB．BecauseC．Unless
Does your mother go to work by bike every day？
No．She sometimes takes bus．（ ）
A．aB．anC．/
Thanks a million for your help．
．（ ）
A．Never mindB．My pleasure
C．Good idea
The novel is great．It's well worth ．（ ）
A．readB．readsC．reading
My neighbor asked me I heard the big noise last night or not．（ ）
A．whetherB．ifC．what
invite Tom and Sally to the party tonight？
Good idea．I'll give them a call right now．（ ）
A．WhyB．Why notC．What about