You may depend on that they will look after your daughter when you are away.
| A．them | B．this | C．her | D．it |
Some amazing people _______ our world for the better in the past 100 years.
| A．change | B．are changing | C．have changed | D．had changed |
_______ was a struggle for me to remember all the strange faces and new names.
| A．It | B．That | C．There | D．This |
Mountain climbing _______ be tiring and many people feel sick as the atmosphere gets thinner.
| A．need | B．can | C．must | D．would |
Now she is considering taking some weight-loss pills, _______ she thinks will help her become slim.
| A．which | B．that | C．what | D．who |
The _______ boy made the police and his family _______.
| A．gone; puzzled | B．missing; puzzled |
| C．missing; puzzling | D．lost; puzzling |