My sister_______ the League last month and she has decided to _______ the activity to help the aged next week.
| A．joined; join in | B．took part in; join | C．joined; attend | D．joined in; join in |
The ground is slippery. Hold onto the rope and don’t ____.
| A．put off | B．turn up | C．let go | D．take apart |
The week-long rainfall has ___ landslides and flooding in the mountain areas.
| A．set about | B．brought about | C．come about | D．put about |
Many scholars and experts from all over the world will be invited to attend this yearly ___ on drug control.
| A．reference | B．intention | C．conference | D．interaction |
. My grandmother likes to surprise people. She never calls ___ to inform us of her visits.
| A．beforehand | B．anyhow | C．originally | D．consequently |
Julie wants to buy a ___ computer so that she can carry it around when she travels.
| A．memorable | B．portable | C．predictable | D．readable |