4. 不要跟隨我船。翻譯全文：___________(A) Proceed by yourself.(B) Go ahead and follow me.(C) Do not follow me.(D) You will follow me.

9. If the water tubes of air cooler are leakage all of the following things may happen except _______. (A) cooling water will flow into the air box (B) charge air temperature will go down a few degrees (C) cooling water will flow out of the drain pipe (D) the engine should operate at a low load, if the leaking tubes can be plugged