No regular advertiser dare produce anything that fails to stick to the _______ of his advertisement.

The chairperson received about three ______ applications to join the Bird watching Club.

I’ll try it again．Never in my life _____ such a particular difficulty．

Not only ________ give people relaxation and pleasure, but ________ increase their knowledge of any kind.

Turn _____ the left at the second crossing and walk ahead _____ about 20metres.[ ]