26.If you want to succeed ,you must work hard and ____you should be sure of success.
Standing on the top of the hill, one would not do anything, but _____ the flowing of the clouds around me.
The “magical apple”, which we wish not to be the last one_____ us, has inspired the imagination and passion of millions of people.
Why the explosion occurred was ____ the laboratory attendant had been careless.
________ one foot before the other, slowly and purposefully, the deer walked up to ______ I was _______.
This field of scientific research remains________.