求教几道英语选择题1.A large fish was slowly swimming through the wate

求教几道英语选择题1.A large fish was slowly swimming through the water,its tail __ back and forth likethe pendulum of a clock.A) swung B) swinging C) was swung D) was swinging2.The cells were designed to _______ sunshine to electricity to run a motor.A) modify B) alter C) convert D) exchange3.The fire started on the first floor of the hospital_____are elderly and weak.A) many of whose patients B) many of which patientsC) many of its patients D) many patients of whom4.A _______ exercise such as running is helpful to our health.A) vigorous B) cautious C) precious D) various5.The information was later admitted _______ from unreliable seurces.A) that it was obtained B) that it has been obtainedC) to be obtained D) to have been obtained