During the opening ceremony, “Miss Smile” has won the hearts of Chinese Internet users after being caught _____ the same smile for nearly 20 minutes．
| A．fixed | B．to be fixed | C．to fix | D．fixing |
The local government has been accused of not responding _________ to the needs of the homeless in the flood-stricken area．
| A．constantly | B．appropriately | C．gradually | D．approximately |
Despite the fact that all three teams ________ different approaches to the problem, they were all immediate successes．
| A．adopted | B．attained | C．adapted | D．attached |
This machine is very easy ______. Anyone can learn to use it in a few minutes.
| A．operating | B．to be operating | C．operated | D．to operate |
Every minute must be made full use _______ in class.
| A．of studying | B．to study | C．to studying | D．of to study |
While these activities might cause laughter ______ respect, in reality they require an enormous amount of strength.
| A．more than | B．rather than | C．other than | D．less than |