炉膛耐火材料施工完毕后,要自然干燥()天。
A、3
B、4
C、5
D、2
参考答案:C
To test eggs, _______ them in a bowl of water: if they float they’re bad, if they sink they’re good.
A.put
B.putting
C.to put
D.to be putting
絪缊