91. The development of synthetic fabrics_______ new challenges to chemical engineers for years. A) bring B) brings C) has brought D) to bring 92. Furniture made in this workshop________ very expensive but very good. A) am B) are C) be D) is 93. Vegetables will grow well if there___________ enough water. A) are B) were C)is D) be 94. My homework ________lately. A) do B) does C) did D) has been done 95. All of the food served in this restaurant yesterday ______ excellent. A) are B) is C) was D) were 96. Neither you or I_____ responsible for the bad result. A) be B) are C) am D) is 97. Mr. Thomson with his wife and his three children______ abroad. A) be B) are C) am D) is 98. Neither Henry nor his friends______yet. A) come B) comes C) has come D) have come 99. Measles _________ a dangerous disease. A) be B) are C) am D) is