4. Watch out! The bench has just been painted. You can fan the wet paint if you want to ______ its drying.
(A) fasten (B) hasten (C) lengthen (D) strengthen
Watch out! The bench has just been painted. You can fan the wet paint if you want to ______ its drying. (A) fasten 扣上/繫上/閂上 (B) hasten 加速/加快 (C) lengthen 使加長/延長 (D) strengthen 加強/增強/加固/強化