The new car won’t go into production soon. The engine of it hasn’t been fully ___.
| A．carried out | B．worked out | C．tested out | D．put out |
Start studying early and don’t study too much .
| A．at one time | B．at a time |
| C．at times | D．from time to time |
They use the same senses as we do and their feet and hands are similar to
ours, chimpanzees still have opposable toes and can grasp things with their feet.
| A．except what | B．except for |
| C．except that | D．besides that |
The question for them was to find out whether bees could tell each other the exact position of a feeding place.
| A．left | B．leaving |
| C．remained | D．remaining |
The primate brain is larger than of other animals.
| A．those | B．what | C．this | D．that |
After designing more experiments,they were able to clarify the procedure bees communicate information that they use to find and fetch food.
| A．by which | B．in which |
| C．by that | D．for which |