We have to be very patient with this experiment. It will take time for some effects to ________ clearly.
A: clear up
B: build up
C: break up
D: show up
A: clear up
B: build up
C: break up
D: show up
举一反三
- We must ( ) and leave at once. A: take up B: put up C: break up D: pack up
- They have arranged for the car to ______ at the airport. A: pick them up B: take them up C: make them up D: build them up
- Some people apparently have an amazing ability to ______ the right answer. A: come up with B: look up to C: put up with D: clear up
- Our income（收入）has got smaller，so we must be realistic and _________ our car. A: take up B: pick up C: build up D: give up
- They __________ a good reputation. A: have built up B: has built up C: builds up D: have build up