Experts think that __________recently discovered painting may be ________ Picasso.
The field research will take Joan and Paul about five months; it will be a long time ____ we meet them again.
1 won’t call you, ________ something unexpected happens.
The manager suggested an earlier date ____________ the meeting.
I _____ it as a basic principle of the company that suppliers of raw materials should be given a fair price for their products.
Small sailboats can easily turn over in the water ______ they are not managed carefully.