ПоМОГИТЕ!!!!!!!!!!!!!!!!!!!1,Tom _____as a journalist here for ten months a) has been

ПоМОГИТЕ!!!!!!!!!!!!!!!!!!!
1,Tom _____as a journalist here for ten months
a) has been working
b) was working
c) worked
d) has worked
2. I ______a decision yet.
a) havent мейд
b) made
c) didnt make
d) hasnt мейд
3. Which is the ____building in this town.
a) older b) oldest
c) elder d) most old
4. Where is Fred? He is ... the bathroom.
a) in b) at c) on d) of
5. Bill signed the agreement,___?
a) did he
b) he didnt
c) he did
d) didnt he