Encourage the students to enroll to my school using MODAL VERBS examples

A. simple past tense and past perfect tense. 1. the japanese (bombed/ had bombed) some philippine military installations in 1941. 2. the japanese (declared/ had declared) war during the pearl harbor incident. 3. the filipinos and americans (failed/ had failed) to protect the country from powerfully-armed invaders. 4. the secretary (called/ had called) the president before he talked to the soldiers. 5. general macarthur called president quezon after he (arrived/ had arrived) at the place