Although _____of danger, tourists can't help taking photos near the cliff （悬崖） ．
| A．having warned | B．warned | C．warning | D．to be warned |
The problem is _______ we can get enough money..
| A．that | B．which | C．whether | D．if |
----- His long ______ speech made the audience very ______ .
-----No wonder many people fell asleep.
| A．tiring…tiring | B．tired…tired | C．tiring…tired | D．tired…tiring |
The boy _________in bed, _________ that he was very ill.
| A．lay, lied | B．lied, lying | C．lay, lying | D．lied, lay |
Parents ____ bring up their children under 16 and educate them properly.
| A．could | B．may | C．might | D．ought to |
This is the man ____ gave me a book.（
| A．which | B．what | C．this | D．who |