．＿＿＿＿＿a wonderful sense of humour．

Many a student _____ going to attend themeeting tomorrow

Great changes ______ in my school in the past ten years

l is also classified as a downer, and though it is legal,it can damage the liver and do great harm if____ in large quantities.

What can trees do _________ us — They can _________ harmful gases and produceoxygen .