To show our respect, we usually take our gloves off _______ we are to shake hands with.
| A．whoever | B．whenever | C．whichever | D．wherever |
Selecting a mobile phone for personal use is no easy task because technology so rapidly.
| A．is changing | B．will have changed |
| C．has changed | D．will change |
When a piece of ice is taken into a warm room, it will become smaller and smaller, until in the end it completely.
| A．is disappeared | B．will disappear |
| C．is disappearing | D．disappears |
They decide to have another factory set up in this town.
| A．paper-made | B．making-paper |
| C．paper-making | D．make-paper |
There is no exact definition of word “happiness”. People are happy for all sorts of reasons.
| A．/; the | B．a; the | C．the; a | D．/; a |
Hospital staff burst into cheers after doctors completed a 20-hour operation to have _______
one-year-old twins at the head.
| A．removed | B．divided | C．separated | D．produced |