—Which of the two books will you buy?— I’ll buy _____ of them, because I’m not interested in them.
By the time you ____ in, I ____ two letters.
To ____ your dream of becoming a scientist, you must work hard from now on.
I suggest ______10% of the bill for the waiter or waitress if a tip isn’t included.
There are _____advertisements which encourage ______to participate in improving their neighbourhood.
Some advertisements_______pictures or words of experts to show people how good the products are.