Life is full of _______.School is thought as the most _______ obstacle(障碍) in the lives of youth today.
| A．challenge; challenging | B．challenges; challenged |
| C．challenges; challenging | D．challenging; challenges |
I __________ my homework yesterday, but unfortunately I forgot about it totally.
| A．need have handed in |
| B．should have handed in |
| C．must have handed in |
| D．may have handed in |
Some insects __________ the color of their surroundings to protect themselves.
| A．take in |
| B．take off |
| C．take on |
| D．take out |
Do you wake up every morning __________ energetic and ready to start a new day?
| A．feel |
| B．to feel |
| C．feeling |
| D．felt |
In that school, English is compulsory for all students, but French and Russian are __________
| A．special |
| B．regional |
| C．optional |
| D．original |
The doctor __________ that the little boy should often be taken out for fun.
| A．recommended |
| B．desired |
| C．spoken |
| D．adopted |