—Can I ask you a few straightforward questions about yourself?
—No problem. I like ________ when people are open and direct.
| A．that | B．this | C．it | D．them |
There was a big dog ______ in front of Mr. Hill’s house, so David didn’t dare to go near it.
| A．to sit | B．sat | C．sitting | D．sits |
The tourists can not help wondering ______ the ancient people could manage to complete the magnificent building without modern equipment.
| A．that | B．how | C．where | D．what |
We have no choice. _______ we go or we stay, the result is the same.
| A．Once | B．Unless | C．Whether | D．While |
As a teacher you have to ______ your methods to suit the needs of slower children.
| A．abandon | B．apply | C．adjust | D．accelerate |
If you stick to it, this plan ______ that your company is well prepared to deal with future challenges.
| A．ensured | B．will ensure | C．ensures | D．would ensure |