【判断题】"To investigate, to improve, to study carefully, to decide to" is preferrable to "to make an investigation of, to make an improvement, to make a careful study, to make a decision" in writing.
【简答题】According to the survey requirements in Chapter 1.2.2, your team may design an interview protocol to investigate the relationship between "language acquisition" and "language learning", and list some ...
【单选题】She hired a lawyer to investigate, only to learn that Gabriel had removed her name from the deed. The infinitive verb phrase "only to learn" is used .