36. —Was the guest’s speech interesting?—Not at all. He was at a ______ and didn’t know what to say when others asked him questions.
—I didn’t tell him the news. —Oh, you ought _______.
______ of money spent on the bridge.
Scientists have to work hard to keep ________ with modern discoveries and developments..
Doctors are doing research to find out what happens physically when people ______ smoking.
If you are feeling so tired , perhaps a little sleep would ______.