He‘sworkinghard_____.
B
for fear (that)“惟恐,以免 ”,引导的从句用虚拟语气 should+动词原形, should 可省略。 lest 意思及用法类似。
Ifhe_____thestorekeeper‘sscissors,hewouldhaveforgottentobuyapair.
Icanspeak_____German.
My wallet is nowhere to be found.I_____it when I was on the bus.