Cloning the sheep ----Dolly is a big in science.
Nowadays everything strange is ________ strange. That is to say, any unexpected thing is possible to happen.
These two areas are similar ________ they both have a high rainfall during this season.
When you go outing with your sisters, you must see to ________ that they are safe.
A model or an experiment in a science class can help students see things which would ______ remain hidden.
Written in a hurry, ________. How can it be satisfactory?