i. 单项填空 1. he acts _______ he didn’t know anything about it.. a. if b. though c. as though d. because 2. the children are looking forward _______ to the park on children’s day. a. to go b. to going c. on going d. with go 3. you promised you would take the boys for a camp, so now you must______. a. make a promise b. keep your word c. break your word d. carry your promise 4. this will probably _______ trouble in the future. a. lead to b. result from