However, experts caution that further ( ) is needed of the pesticide's safety and effectiveness before it can be released to the public.

(单选题)Because of such factors, engineers have worked on increasing (单选题)What is the passage trying to inform us? ( ). (单选题)According to the passage, which of the following is NOT a go (单选题)It can be inferred from the passage that ( ). (单选题)( ). (单选题)( ). (单选题)( ). (单选题)( ). (单选题)( ). (单选题)What does Rogeberg think of IQ tests in the future? ( )